參數(shù)資料
型號(hào)： ZL38065GDG
廠商： ZARLINK SEMICONDUCTOR INC
元件分類： 數(shù)字傳輸電路
英文描述： 32 Channel Voice Echo Canceller
中文描述： DATACOM, ISDN ECHO CANCELLER, PBGA208
封裝： 17 X 17 MM, 1.30 MM HEIGHT, MO-192, LBGA-208
文件頁(yè)數(shù)： 16/48頁(yè)
文件大小： 658K
代理商： ZL38065GDG
ZL38065
Data Sheet
16
Zarlink Semiconductor Inc.
Back-to-Back configuration is selected by writing a “1” into the BBM bit of Control Register 1 for
both
Echo
Canceller A and Echo Canceller B for a given group of echo canceller. Table 3 shows the 16 groups of 2 cancellers
that can be configured into Back-to-Back.
Examples of Back-to-Back configuration include positioning one group of echo cancellers between a codec and a
transmission device or between two codecs for echo control on analog trunks.
2.3 Extended Delay Configuration
In this configuration, the two echo cancellers from the same group are internally cascaded into one 128
milliseconds echo canceller. See Figure 9. This configuration uses only one timeslot on PORT1 and PORT2 and
the second timeslot normally associated with ECB contains quiet code.
Figure 9 - Extended Delay Configuration (128 ms)
Extended Delay configuration is selected by writing a “1” into the ExtDl bit in Echo Canceller A, Control Register 1.
For a given group, only Echo Canceller A, Control Register 1, has the ExtDl bit. For Echo Canceller B Control
Register 1, Bit 0 must always be set to zero.
Table 3 shows the 16 groups of 2 cancellers that can each be configured into 64 ms or 128 ms echo tail capacity.
3.0 Echo Canceller Functional States
Each echo canceller has four functional states:
Mute, Bypass, Disable Adaptation
and
Enable Adaptation
.
3.1 Mute
In Normal and in Extended Delay configurations, writing a “1” into the MuteR bit replaces Rin with quiet code which
is applied to both the Adaptive Filter and Rout. Writing a “1” into the MuteS bit replaces the Sout PCM data with
quiet code.
In Back-to-Back configuration, writing a “1” into the MuteR bit of Echo Canceller A, Control Register 2, causes
quiet code to be transmitted on Rout. Writing a “1” into the MuteS bit of Echo Canceller A, Control Register 2,
causes quiet code to be transmitted on Sout.
LINEAR
16 bits
2’s
complement
SIGN/
MAGNITUDE
μ
-Law
A-Law
CCITT (G.711)
μ
-Law
A-Law
+Zero
(quiet code)
0000
hex
80
hex
FF
hex
D5
hex
Table 1 - Quiet PCM Code Assignment
+
-
channel A
channel A
ECA
Sin
Sout
Rout
Rin
echo
path A
Adaptive Filter
(128 ms)
PORT1
PORT2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ZL38065GDG2 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 32CH G.164/G.165/G.168/G.711 W/ TONE DET - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC VOICE ECHO CANCEL 208LBGA 制造商:Microsemi Corporation 功能描述:IC VOICE ECHO CANCEL 208LBGA
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ZL38065QCG1 制造商:Microsemi Corporation 功能描述:PB FREE 32CH VEC+ENHANCED NOISE MATCHING 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 32CH G.164/G.165/G.168/G.711 W/ TONE DET - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC VOICE ECHO CANCEL 100LQFP 制造商:Microsemi Corporation 功能描述:IC VOICE ECHO CANCEL 100LQFP
ZL38070 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:256 Channel Voice Echo Canceller
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